Process for the manufacture of sheet-metal elbows.



No. 810,155. PATENTED JAN.16, 1906.

W. H. KLAUER. PROCESS FOR THE MANUFACTURE OF SHEET METAL ELBOWS.

APPLICATION FILED FEB-1,1905.

2 SHEETS-SHEET 1.

WITNESSES. HgLZNTJR. M-

flww K BYWL I ATTORNEYX No. 810,155. PATENTED JAN. 16, 1906 W. H.KLAUER.

PROCESS FOR THE MANUFACTURE OF SHEET METAL ELBOWS.

APPLICATION FILED PEB.1,1905v 2 SHEETS-SHEET 2.

. WITNESSES Q ZNVENTOR. I

fiM IA/ilM LU Ji /32mm 1-1. KIZLQMW ATTORNEY tors of Shoot-MetalSinscificotion of llEszorit.

To all whom it may omwern:

Be it known that i, WHJJA H. KLAUEFL, s citizen of tho United States,residing the city county of Duouqu sud State of lows, lows inventedcertain new sud useful Improvements in Froosssss tho Manufaclfilbows;and I do hereby rloclzirs the follr specification to he 3. full, clear,and. oxsct oosoriptioz; of the invention, which "will enable outliersskilled in the art to malrs and uss the some.

l invention relates to the process rostrrorl of in onu'lsotui'ingsheet-moral ol bows and one of the objo ts to provide a simple methodwhereby: shoot-metal elbows may be ossily manufactured at littlo expenssand still provirls against any weakening or thinning of the metal anyport lie elbo and os' 'sor-ially at the bulge. v

A further ob goct is to provide at process whereby not only elbow withsinglo bond or bulge therein may produced, but also a series of elbowsor curves n the some pips.

' 0 consists, essentially, in first cutting out the blank from thesheet, than 'ploiting the blank with plaits, 8fiCll0fV/l1i1 of uniformWidth throu liout its entire length and ssoh parallel Witli the other,than forming tho blank with the olsits thoreori in to tube, sud thanrswirig out "tlos plsits at certain aortions to form the curve or bulgeof the el ow and always mointsiziing all the folds of each plsit flatand in contact with each other with one shoot of tho fold outside andone inside of the control slioet.

The following specification will i'ully orcplriin my motlaocl, when readin connection with the drawings aooompanying the some and forming s portlxoroof.

is a psrt-porspectivo view and pzirt-socliwuil view of thmblsnk after itis plzutorl sh wing the foods in which the plrtits sro folded. 2 is sside olovritiou of tho bloul shown in liig. 1 s1" tor it has boon formedinto 51, tube. Fig. 3 is a side elevation of a. tube corrugated After itis plaited. Fig. 4 is a perspective View of the oomplotod o1 bow,showingtho plsits drawn out to form the curve of the elbow. Fig. 5 is aperspective view of the pipe having 5 compound curve therein formsd bythe some process.

Likelstters o'trefo rsncs denote corresponding parts in osoh of thefigures.

.lho msnner in which 1 carry out my procis by first outtin out from theslust metal is rsctangulsr glsnk A. blanlthen plsrsed in splsltirr*-roaolrius, Wl 'c. plaits or folds over fist tlo r etsiv osswise theblank and forms tf'os la s thicknesses of tho metal.

punts lt will be obssrvsr.

tlist Plait 1s flat sun of uniform Wio tli fromiond to 03l(l;b1ll6 isnot ssssnti' l new ssssry that all at tho plsi ts shrill of the Width,out may vsry 1:1 Wuirl as shown m. TV If J" mg. l. Noon iris requisrlsnL I" are formed, tnsn the blank m 1 the pious thereon is placed isstuoofor where it is host into a tubs y. r is tons then placed in amachine provirlorl for purpose or irswiug out the plsits, plaits s-rstlisro sul'lioiently drown. out at oerto form the A curve in the bow insuoh msnuer s the plsits fist after they are drawn on witl'iout stretchEng orwos lung in any manner the rial, and when com lotorl there willone mick mess of thornetal of sash shit on. the outsids snrlono on theinsirls of tlrs osntrsl shoot of the oloi iii-Fig. 5 shown tube 1, inwhich is a. combined. elbow or s series of sllwows 0" curves. The mannerof forrriirig is prootisslly. tho some as that rsviously rissor' exceptthat one or more phi-its are first out at such portions of the ulsit asto form the elbow with the dosired curve, as shown at Then other plsit-sare drawn out at lil- \J'. feront relative. parts of tlio plsits to formtbs elbow and so The only oliaug or difference of construction is in thopoltions of the ploits that are drawn out.

it will be son; by this mo is of sonstror. that there will no nothinning or woulqouii of the metal at. on part the elbow, and

also it will be seen that out oi as siriglo of metal a series of elbowsmay be iorrnorl to adapt it for use. in min-pipes i lisrsthors areprojections on the building to wh ch as pipes are to be attached and thecurves in tubes can be easily sclaptsdto those ,orojso tions.

This method Will obtain as well in l corrugated elbows in tubes asl-llOSi': 4 plain. The preferable. mode in tion of corrugated olbows isto rugations thereon alter the oll plate; but bythis prooosstlio "-l rbe corrugated after it is plzii into s. tube and. bo'foro it is frlooW,as shown in Fig. 3.

Having now described my invention and 1 the mode of o erating, what Iclaim, and dei sire to secure by Letters Patent, is

1. The process of manufacturing sheetmetal elbows which consists offirst forming flat plaits in a sheet-metal blank, forming the blank thusplaited into a tube, and then drawing out certain portions of the flatplaits l to form the curve of the elbow leaving the undrawn-out portionsof the plaits flat when i the elbow is finished.

2. The process of making sheet-metal elbows which consists in cuttingout a rectangular blank from the sheet of metal, plaiting l or foldingthe blank crosswise with each plait l of uniform width throughout itslength, bending the plaited blank into a tube and 1 then drawing out theplaits at such ortions as desired to form the curve of the el ow andleaving the folds of the plaits flat and in contact with each other, theone outside and the other inside of the central sheet of the lait.

3. The process of manufacturing s set- Tnetal elbows, which consists ofcutting out the blank, then forming flat plaits or folds crosswise ofthe blank, turning the blank into a tube with the pi ai ts therein, andthen draw- 1 blank, plaitin the blank with flat p ing out part of theplaits at certain portions of the plaits and other plaits at differentportions to form different elbows in the same tube.

4. The process of manufacturing sheetmetal elbows, which consists incuttinlg out a threefold thic messes or sheets, forming the its of Iblank into a tube with one thickness or sheet of the metal 11 on theoutside and one u on the inside of .t 1e central sheet of the p uit,then artially drawing out certaintportions of the p aits to form thecurve of the elbow.

5. The process of manufacturing corruated sheetanetal elbows, whichconsists in cutting out a blank, forming threefold fiat plaits therein,forming the plaited blank into a corrugated tube, and then drawing outcertain portions of the flat plaits to iorm the curve of the elbow.

In testimony whereof I, aiiix my signature in presence of two witnesses.

1W1lil 11AM ll. KLAUER.

Witnesses:

M. M. CADY, M. L. HEMKER.

